High-tension terminal for spark-coils.



PTENTED OCT. 9, 1906.

E. `B. JACOBSON.

TERMINAL POR SPARK GOILS.l

HIGH TENSION APPLIUATION FILED FEB. 7, 1906.

UNITED sTAATEs PATENT oEEioE.

EDWARD B. JACOBSON, OF PITTSFIELD. MASSACHUSETTS, ASSIGNOR TO PITTSFIELDVSPARK COlL COMPANY, OF PITTSFIELD, MASSACHUSETTS, A CORPORATION.

HIGH-TENSION TERMINAL FOR SPARK-COILS.

N o. 833,135. Specieaton of Letters Patent.

AppliGaJi-,ign filed February 7, 1906. Serial No. 299,877.

Patented Oct. 9, 1906.

end of the insulating-piece b is screw-thread- Beit known that I, EDWARD B. JAOOBSON, l ed, as shown at k, the purpose of which will a citizen of the United States. of America, rebe explained below. siding at Pittsiield7 in the county of Berlrl Referring to the cable end of the device, m

shire and State of Massachusetts, have indesignates a heavily-insulated cable having vented new and useful improvements in the core-wires n, which before being sepa- High-Tension Terminals for Spark-Coils7 of rated are shown twisted together in Fig. 2 which the following is a specification. l,

in the ordinary manner but with the insula- Tliis invention relates to high-tension tery tion out away for a portion of their length. minals for spark-coils; and it has for its obl odesignates the position of the core-wires of ject to provide a device that can be readily the cable after beinguntwisted and bent attached to the end of the cable leading to -down flat onto the squared end p of the insuthe sparking plug of internal-combustion lation of the cable.

engines and means for readily securing the g designates the metallic cap or thimble cable t0 the coil-box for making a good confor clamping the end of the cable m and for tact and at the same time without any danforming a good electrical connection between ger of receiving a shock from the coil. the cap and the core-wires n. In the cap are The invention is especially adapted for the V-shaped slits r for the purpose of imautomobiles, but may be used for stationary parting to the lower edge of the capor thimengines or any high-tension coil or inductionble a close fit to the cable m, and in case the coil. cable is a comparatively small one the tongues In the drawings forming part of this applis between the slits can be bent inward against cation7 Figure 1 is a vertical sectional view the same. through the operative parts. Fig. 2 is a det designates small spurs that are punched tail view of the end of the cable, showing the in the sides of the cap. These spurs point insulation cut away. Fig. 3 is a view of the upwardly, as shown, and are for the purpose end of the cable, showing the core-wires sepof pressing into the sides of the cable and searated prior to applying the connecting-cap. curely preventing the cap from being with- Fig. 4 is a detail perspective view of the cap drawn after the same is pushed down onto used for making contact with the core-wires the end of the cable after the core-wires have of the cable. been evenly separated, as shown in Fig. 3.

Referring to the drawings in detail, a, des- In the act of pushing the cap g onto the end ignates a portion of the casing of the box conof the cable the wires n are bent downward taining the coil. over the edge of the same, as shown in dotted b is a circular piece of insulation, preferably lines at u.

o designates a flange on the cap or thimble hard rubber, secured to the casing a, by means of the smallv sharp spurs c, which are piece q. Before the cap .is placed on the cable one or more rubber washers w are driven into the wooden casing of the box.

d designates a hub on the piece b forenslipped onto the cable and against which the gaging an opening e of the casing a. flange o rests when clamped to the piece b by f designates a disk-shaped piece of metal the cup-shaped connecting-piece of hard having an integral depending hollow hub or rubber, which is internally screw-threaded at its upper end, as designated at 2. The inboss g at right angles thereto and screwi terior of this piece :rhas an inclined shoulder at 3 for engaging the rubber washers w and threaded at its lower end, the screw-tlireads tightly clamping them between the two flanges o and 3.

being on the exterior thereof and designated by the letter h. The circular-shaped piece f is sunk into the side of the casing a at the recessed part i. A designates a small T-shaped piece of metal7 (preferably brass) to which a terminal of the coil-spring 6 is attached.

5 designates a small cylindrical piece of Screwed onto the lower end of the hub or tubular boss g is a metallic nut j for securely brass to which the spring 6 is attached by tightly engaging the stem 7 on the piece 5.

To V@ZZ whom, it may concern: 1

locking the parts b and f to the casing a. This nut is shown flush with the lower end of the insulating-piece b. The exterior lower IOO The spring 6 at its opposite end tightly engages the stem S on the piece 4. The parts 4, 5, and 6 have a loose sliding fit within the hollow hub g.

9 designates a rubber washer or gasket between the lower shoulder of the piece I) and the upper edge of the connecting-piece for making a water and air tight joint.

The cable m passes through an opening 10 in the lower side of the connecting-piece x, as shown, and opens into a much larger opening l1, which contains the end of the cable, cap-piece g, &c. To connect the cable In to the terminal `cylindrical piece 5, (it being understood that the piece 4 is normally pushed downward by the coil resting thereon and the part 5 normally extending beyond the lower edge of the tube 9,) the connecting cupshaped piece is brought upward against the rubber washers w and the cap q is placed in engagement with the protruding piece 5. Continued upward pressure on the connecting-'piece 0c against the spring 6 will effect the engagement of the threads 2 and 7c. -Then by simply rotating the connecting-piece x the rubber gasket 9 will be tightly clamped.

y It will thus be seen that the cap Q and terminal piece 5 are therefore drawn together under pressure and a good electrical contactl made. To disconnect the cable, all that is necessary is to simply unscrew the connecting-piece as readily understood.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. In a high-tension terminal device, a cable, the core-wires thereof being separated V and bent back upon the cable, a cap or thimble attached to the end of the cable and engaging the separated core-wires, and means for locking the cable and cap to the coil-terminal.

2. A high-tension terminal device including a hollow hub or boss, two cylindrical pieces slidably mounted therein, a spring connecting the cylindrical pieces, a cable, a cap on the end thereof, and means for drawing the cap and one of the cylindrical pieces together.

3. In a high-tension terminal device, a cable, a connecting-piece engaging the cable, ak

hub or boss secured to a coil-box, a conducting-cap on the end of the cable, conducting means from the box to the cap, and interengaging means between the connecting-piece and hub or boss for drawing the cable firmly against the conducting as described.

4. A terminal-connecting device, a cable having the core thereof separated, a cap secured to the cable and in contact with the separated core, a hollow hub or boss secured to the coil-box, a terminal projecting beyond the hub or boss, and means for securing the cable to the box 'and bringing the cap and terminal together. *A

5, In a terminal-connecting device, a cable, a cap engaging the separated ends of the core thereof, the cap having spurs or projections for engaging the outer surface of the cable, a fiange on the cap, a threaded boss or hub secured to a fixed support, a terminal projecting therefrom, a connecting-piece internally threaded at one end and having an means from the box,

inclined shoulder at the other for receiving the cable, whereby when the connected piece is secured onto the boss or hub, the inclined shoulder is brought against the iiange of the cap and the said cap is brought against the projecting terminal.

6. In an electrical terminal-connecting device for cables, the cable having its ends separated, a cap engaging said separated ends, a

tubular element, a terminal projecting therefrom, an element secured to a fixed support, a connecting-piece embracing the cable, and interengaging devices between said lastnamed element and the connecting-piece for drawing the parts together.

7. In a cable-connecting device for sparkcoils, a conducting element carried by the box and having a tubular portion integral therewith, its outer end being threaded, slidable elem ents located within the tubular portion, a spring forconnecting the slidable elements, a threaded boss secured to the box, a

nut within the boss and carried by the outer end of the tubular portion and Hush with the end of the boss, a cable having separated core-wires, a cap engaging the separated core-wires and inclosed by a connecting element, said connecting element being internally screw-threaded at one end and having a shoulder for exerting pressure on the gap whereby when the -connecting element is threaded onto the boss, the cap is drawn against one of the slidable elements within the tubular portion as described.

EDWARD B. JACOBSON. Witnesses:

JONATHAN HAIGHT, EDWARD T. SCULLY.

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